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Next.js invalid webpack resolve alias override

Invalid webpack resolve alias

Next.js detected a custom webpack resolve.alias override that replaced internal aliases instead of extending them, which breaks framework internals during build.

Invalid webpack resolve aliasconfiguration

Observed message

Invalid webpack resolve alias

Why it happens

  • A custom webpack function overwrote config.resolve.alias completely.
  • Next.js private aliases were dropped while adding project aliases.
  • A build customization changed webpack resolution without preserving framework defaults.

How to fix it

  1. Spread the existing config.resolve.alias object before adding custom aliases.
  2. Avoid replacing the alias object with a new one unless all required aliases are preserved.
  3. Retest the build after restoring Next.js internal alias handling.

Official reference

Next.js Docs: Invalid webpack resolve alias

Related errors

Invalid next.config.jsNext.js configuration contains invalid optionsnext.config.js Loading ErrorNext.js could not load next.config.jsInvalid i18n configNext.js invalid i18n configurationInvalid images configNext.js invalid images configuration

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Next.js Invalid webpack resolve alias: causes and fixes | Error Atlas